let me see what yall think.... i have a 350 with 993 heads. .480 lift cam. and regular 1.5 rockers just yesterday 2 of my rocker arms were very loose and tapping bad, so i tightened them down and double nutted the nutts so it would be harder to back off. but they started tapping again and became very loose and not much lift . i thought at first it was a "wiped" cam the lobes were wiped but i am not sure now.with the engine running i adjusted the vavles stopped tapping on one then started tapping again so i did a 1/4 round more stopped tapping then tapping again... no mattter what i do it taps all the lifters are good pushrods are strait, no valves sticking nothing like that i just cant figure it out. theres 2 valves that isnt getting much lift as comarped to all the others and the rocker arm is tightened almost all the way down the the end of the threads and is still loose. do you have any ideas? please tell me

they are hydraulic lifters, but i know the problem now, i checked every stud, they all have the same height, push rods are all strait, but its the camshaft 3 of the cam lobes are worn down "wiped" so now i have to do a camshaft change. the motor is only 5 months old too. What could make this happen?

I've never done the cam breakin and have never had a prob.Not that thats the right way though.
One question for you is,was it a comp cam and did you use that red lube they supply.The reason I ask is I'm getting ready to pull mine back apart cause that sh#t is so thin.I'm gonna call comp tommarow.I'm starting to think I shoulda stuck with the cheapo mass produced cams(summit,PAW,clevite)theve allways done me good.
Read my post "Cam lube the graphite stuff vs. the red stuff"its a page back now.

if the rocker arm nut is bad (easy to turn) and backs of the lifter can bounce around in between the lobe and the push rod and acualy beat the cam lobe flat. I've seen stock rocker nuts destroy several camshafts. always double nut or use polly locks (extra security is always nice). just some advice.

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